Secondary-battery plate.



W. MORRISON. SECONDARY BATTERY PLATE.

APPLICATION IILBD JUNE 29,1003.

91 6,576. Patented Mar. 30, 1909.

Juvenfa r:

UNITED. STATES PATENT OFFICE.

1 WILLIAM MORRISON, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

BULKLEY, DURAND & DRURY, OF CHICAGO, ILLINOIS, A FIRM.

" SECONDARY-BATTERY PLATE.

' To all whom it may concern:

- a citizen of the United States of America,

- storage battery plate Improvement in Be it known that I, WILLIAM MORRISON,

and resident of Chicago, Cook county, Illinois, have invented a certain new and useful Secondary-Battery Plates, of which the following is a specification.

My invention contemplates the use of a salt .of barium for the purpose of preventing disintegration of the active material of a while immersed in an electrolyte consisting of a solution of sulfuric acid.

In the accompanying drawings: Fi ure 1 is a erspective of a form of storage attery p ate in which my invention may be.

I employed. Fig. 2 is a cross section of said ammomum sul plate.

In practici suitable quantlty of redlead place the same on a suitable surface, as,

my invention, I first take a or litharge and for example, the surface of a iece of glass. To

this red lead or lithar e then add a saturated solution of hy roxid of barium, in the proportion of one fluid ounce of solution to one and a quarter pounds of lead, so as to fairly moisten the. lead or litharge and reduce thesameto a slight pasty condition.-

When the mixture of the foregoi ingredients has been sufliciently kneade and worked into a thorou hly pasty condition,

--I then take the lead p ate or grid and fill its 0. enings or cavities with the paste, pressing t e paste in with the pressure of a trowel or putty knife, and then carefull smoothing off the surface of the plate. or this, I find that the best results are obtained by withdrawing as much water from the aste in the lieved of considerable of the water and plate as possible by'pressing t e opposite surfaces of the plate alternately upon an this opabsorbent paper, and-by repeat' eration until the paste in the p ate is re- Specification of Letters Patent. Application filed June 29, 1903. Serial No. 163,463.

Patented March 30, 1909.

EIS SED -moisture. In some cases it is advisable to apply pressure with a press or other means, particularl where longer life and slower rate of de ivery of the current is required. When this has been done, it is well to then allow the plate to stand for a suitable length of time, say for about five da s. At the end of this time, the late can be ipped in a solution of weak sul ric acid and water, and this dipping repeated once or more, according to 'udgment, will be found to exert a further ardening effect upon the aste.

A plate constructed byt e foregoing process has a paste or active material which remains hard and firm in use, for a much longer-time than is usual with the old or former methods, which is tough and not liable to crack or break, and which does not disintegrate as quickly as the substances heretofore employed when immersed and used in the usual electrolyte containin sulfuric acid. The salt acts as a bond, an does not weaken or disintegrate under the influence of sulfuric or sulfurous acid as soon as the substances heretofore employed.

The" grid can be constructed in any uitables manner. For example, it may consist of a couple of lead plates A and B, suitably secured together, and so constructed as to provide opening: into which the paste can be pressed or pac ed, and of suc formation that the paste when hardened will be held firmly in lace. It isobvious however that any ot er suitable'known or approved form of. grid can be employed in combination with my improved paste.

Broadly considered, my invention con-.

acid, water, ammoma sulfate, and barium sulsfate.d b

lgne Y 19th day of May, 1903.

' WILLIAM MORRISON.

Witnesses CHARLES HIOKOK, WM. A. Hammns. 1

me at Chicago, Illinois, this 

